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plutino

[ plōō-tēnō ]
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A trans-Neptunian Kuiper belt object that orbits the Sun in the same time period as Pluto, exactly two orbits for every three orbits that Neptune makes. Too small to be considered planets, plutinos make up approximately one fourth of the Kuiper Belt objects.
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The rainy weather could not ________ my elated spirits on my graduation day.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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